An Afghan protester screams near the scene of a suicide attack that targeted crowds of minority Shiite Hazaras during a demonstration in Kabul on Saturday. Wakil Kohsar /AFP/Getty Images hide caption

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Afghan police inspect the site in in Kabul, Afghanistan, where a bus convoy was attacked on Thursday. The buses carrying police cadets were targeted as they were on their way from the neighboring Maidan Wardak province to Kabul. Anadolu Agency/Getty Images hide caption

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On Wednesday, Afghan mourners offer funeral prayers for a victim killed in Tuesday's bomb blast in Kabul. The Taliban said it carried out the brazen assault near the defense ministry, which would mark the first major Taliban attack in the Afghan capital since the insurgents announced the start of this year's fighting season. Shah Marai/AFP/Getty Images hide caption

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A wounded Afghan police officer is helped from the scene of Friday's explosion and gunfire in Kabul. Omar Sobhani /Reuters /Landov hide caption

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NPR's Sean Carberry, reporting from Kabul

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The scene Thursday in Kabul, Afghanistan, after a suicide bomber attacked a NATO convoy. Zhao Yishen /Xinhua /Landov hide caption

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A man grieves as others try to help victims and remove bodies from the scene in Kabul earlier today (Dec. 6, 2011) after a suicide bomb exploded in a crowd of Shiite worshipers. Massoud Hossaini /AFP/Getty Images hide caption

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Quil Lawrence, reporting from Kabul

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Afghan Security personnel stand above the body of one attacker, on the 10th floor of the building in Kabul from which RPGs and other weapons were fired. David Gilkey/NPR hide caption

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NPR's Renee Montagne and Quil Lawrence in Kabul

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